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प्रश्न
True or false?
In a chemical change, rearrangement of molecules and atoms involves some energy changes.
पर्याय
True
False
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उत्तर
True
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संबंधित प्रश्न
What do you observe when :
a piece of paper is burnt
What do you observe when :
solid ammonium chloride is heated
State whether the following is physical or chemical changes.
Melting of wax —
Fill in the blank
An earthquake is a _______ change.
Melting of solid (wax) is a physical change.
Under which different types can the following changes be classified?
Occurrence of an earthquake.
Under which different types can the following changes be classified?
Revolution of the earth around the sun.
Give reason.
While purchasing canned food, its expiry date should be checked.
Give reason.
A dry handkerchief gets wet at once on dipping in water, but it takes longer for a wet handkerchief to dry.
Fill in the blanks with the appropriate words of the statement given below:
Chemical changes may involve exchange of energy in the form of __________ and _________.
